Players could play as a solider class, collecting weapons and shooting opponents, or as a "baby Godzilla," using claws, teeth and fire breath to survive. A third option was to play as an unarmed reporter who was invincible while crouching, and earned points by getting shots of the match's action with their videocamera - which the soldiers could also view for recon.
Four match types were released before GameStorm was disbanded:
- Free-For-All was a standard deathmatch with no teams or allegiances.
- Team Deathmatch pit the blue team against the yellow team (teams could be of mixed species). The first team to kill a set number of opponents won.
- Eggstatica was a simple capture the flag game. Soldiers would try to remove Godzilla eggs, while the baby Godzillas protected their nest.
- Escape from New York pit the soldiers against the baby Godzillas. The Godzillas tried to eat enough fish (scattered around the level as power-ups) to grow to their maximum strength and escape. Soldiers tried to kill a set number of Godzillas before this could happen.